4. Find the sum of the polynomials:
(i) 6a2b2 - 4a , 7a2b2 - 2a
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Step-by-step explanation:
6a²b² + (-4a) + 7a²b² - 2a
= 6a²b² - 4a + 7a²b² - 2a
= 6a²b² + 7a²b² - 6a
= 13a²b² - 6a ans.
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